2164423123 has 4 divisors (see below), whose sum is σ = 2168578008. Its totient is φ = 2160268240.

The previous prime is 2164423109. The next prime is 2164423127. The reversal of 2164423123 is 3213244612.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2164423123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2164423091 and 2164423100.

It is not an unprimeable number, because it can be changed into a prime (2164423127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2076661 + ... + 2077702.

It is an arithmetic number, because the mean of its divisors is an integer number (542144502).

Almost surely, 2^2164423123 is an apocalyptic number.

2164423123 is a deficient number, since it is larger than the sum of its proper divisors (4154885).

2164423123 is an equidigital number, since it uses as much as digits as its factorization.

2164423123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4154884.

The product of its digits is 6912, while the sum is 28.

The square root of 2164423123 is about 46523.3610458230. The cubic root of 2164423123 is about 1293.5425577675.

Adding to 2164423123 its reverse (3213244612), we get a palindrome (5377667735).

The spelling of 2164423123 in words is "two billion, one hundred sixty-four million, four hundred twenty-three thousand, one hundred twenty-three".